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2 answers:
Answer: 21
Step-by-step explanation: We can use the method: Keep, Change, Flip.
1. Keep 7.
- If you want 7 to become a fraction, you can do it like this:
2. Change division to multiplication.
- It's very simple. Just change the sign.
3. Flip .
- It's like converting it into a improper fraction.
is now
.
Now we can solve!
Therefore, your answer is 21/1 or just 21.
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Answer:
Fourth term: =
=
Fifth term: =
= 1
Sixth term:
Step-by-step explanation:
The geometric progression is:
The first term, a, is 9
To find the common ratio, r, all we have to do is divide a term by its preceding term.
Let us divide the second term by the first:
That is the common ratio.
Geometric progression is given generally as:
where a = first term
r = common ratio
= nth term
We need to find the 4th, 5th and 6th terms.
Fourth term: =
=
Fifth term: =
= 1
Sixth term:
Answer:
BC ≈ 19.4 cm
Step-by-step explanation:
using the cosine ratio in the right triangle
cos71° = =
=
( multiply both sides by BC )
BC × cos71° = 6.3 ( divide both sides by cos71° )
BC = ≈ 19.4 cm ( to 3 sig. figs )